Motion and Time — Science STD 7 — Question

Why can you not use a clinical thermometer to measure the temperature of a candle flame?

Fill in the blanks in the following statement: When carbon dioxide is passed through lime water, it turns milky due to the formation of __________.

Name the bacteria that can fix atmospheric nitrogen.

Name the process through which the heat of sun reaches us.

Following are some of the characteristics of animals:

1. Diets heavy on fruits
2. White fur
3. Need to migrate
4. Loud voice
5. Sticky pads on feet
6. Layer of fat under skin
7. Wide and large paws
8. Bright colours
9. Strong tails
10. Long and large beak

For each characteristic indicate whether it is adaptation for tropical rainforests or polar regions. Do you think that some of these characteristics can be adapted for both regions?

What type of image is formed by a plane mirror?

The to and fro motion of an object from the position of rest is called a ___________.

Why one thick blanket is less warm up than two thin blankets joined together?

Boojho had the following parts of a rose plant-a leaf, roots, a branch, a flower, a bud and pollen grains. Which of them can be used to grow a new rose plant?

Define heat.